docs: def _utime(self, path, modified, accessed):
          """Set the *accessed* and *modified* times of a resource.
          """
          if accessed is not None or modified is not None:
              accessed = int(modified if accessed is None else accessed)
              modified = int(accessed if modified is None else modified)
              self._sftp.utime(path, (accessed, modified))
          else:
              self._sftp.utime(path, None)